Know when your site changes —
and when your customers can't log in.
Full-site change & defacement detection, synthetic login checks, and uptime monitoring — in one $20 plan.
Free plan — no credit card. 15 monitors, 5-minute checks, email alerts.
Change & defacement detection
Know the moment a page changes
MonitorSpider crawls your site to a depth you choose, fingerprints every page, and alerts you the instant content changes — a defacement, a broken deploy, an edited price, or a vanished page.
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Recursive crawl with per-page content hashing.
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Catch defacements and unauthorized edits fast.
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Version history & line-by-line diffs — see exactly what changed.
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Alerts by email, Slack, Telegram, or webhook.
Login monitoring
Your homepage being up isn't enough
A green uptime check doesn't mean anyone can actually sign in. MonitorSpider runs a real scripted login on a schedule and measures how long your post-login assets take to load — so you hear about a broken auth flow before your customers do.
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Scripted login with success/failure assertions.
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Per-element latency on the authenticated page.
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Latency thresholds with debounced alerts.
Everything else you'd expect from a monitor
Change detection and login checks sit on top of a full uptime-monitoring engine.
Uptime & HTTP(S)
Status-code and response-body checks with response-time tracking and uptime %.
DNS record watch
Get alerted when an A, MX, TXT, or any DNS record changes out from under you.
FTP / SFTP
Confirm your file servers are reachable and accepting connections.
SOCKS proxies
Health-check SOCKS4/5 proxies from our probes.
SSL certificates
Track expiry and chain health so a cert never lapses on you again.
Multi-channel alerts
Email on every plan; Slack, Telegram & webhooks on Premium.
Server & agent metrics
Watch CPU, memory & disk from your servers — Prometheus, Nagios NCPA & Telegraf agents, with thresholds and graphs.
Public status pages
Publish a branded status page for your customers — live status and 90-day uptime, on your own slug.
Run a lot of client sites?
MonitorSpider is built for agencies and MSPs: watch every client's site — uptime, changes, logins, certs — from one dashboard, and route alerts wherever your team already works.
- Every client site in one place
- Team seats — give staff their own logins
- Alert routing to Slack, Telegram & webhooks
